TOTAL SOLAR ECLIPSE OBSERVATIONS OF HOT PROMINENCE SHROUDS
- Institute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822 (United States)
- Faculty of Mechanical Engineering, Brno University of Technology, 616 69 Brno (Czech Republic)
- Astronomical Institute, Slovak Academy of Sciences, 059 60 Tatranska Lomnica (Slovakia)
- Department of Physics and Astronomy, Appalachian State University, 525 Rivers Street, Boone, NC 28608 (United States)
- Electricon, Boulder, CO 80204 (United States)
- Physics Department, Bridgewater State College, Conant Science Building, 24 Park Avenue, Bridgewater, MA 02325 (United States)
Using observations of the corona taken during the total solar eclipses of 2006 March 29 and 2008 August 1 in broadband white light and in narrow bandpass filters centered at Fe X 637.4 nm, Fe XI 789.2 nm, Fe XIII 1074.7 nm, and Fe XIV 530.3 nm, we show that prominences observed off the solar limb are enshrouded in hot plasmas within twisted magnetic structures. These shrouds, which are commonly referred to as cavities in the literature, are clearly distinct from the overlying arch-like structures that form the base of streamers. The existence of these hot shrouds had been predicted by model studies dating back to the early 1970s, with more recent studies implying their association with twisted magnetic flux ropes. The eclipse observations presented here, which cover a temperature range of 0.9 to 2 x10{sup 6} K, are the first to resolve the long-standing ambiguity associated with the temperature and magnetic structure of prominence cavities.
- OSTI ID:
- 21457094
- Journal Information:
- Astrophysical Journal, Vol. 719, Issue 2; Other Information: DOI: 10.1088/0004-637X/719/2/1362; ISSN 0004-637X
- Country of Publication:
- United States
- Language:
- English
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